Pressure regulator



H w. DAY. PRESSURE REGULATOR. AiPLlCATION FILED JAN. 10, I92!- Pa'tented Aug. 15, 1922.

4 SHEETS--SHEET H. W. DAY.

PRESSURE REGULATOR. APPLICATION FILED JAN. 10, 1921.

PatentdAug'. 15, 1922.

4 SHEETSSHEET 2.

U HFH 47 i J;\ I l a 2 1 e5 48 I 86' l H. W. DAY.

PRESSURE REGULATOR; APPLICATION FILED JAN. I0, I92I.

Patented Aug. 15, 1922.

4 SHEETSSHEET 3.

65 :ivdfi jafirwemi 31 @Weri I ay,

H. W. DAY.

PRESSURE REGULATOR. APPLICAHON FILED 1AN10,192!.

1, 12 5, 834. Patented Aug. 15, 1922.

4 SHEETS-SHEET 4.

,Ea-a/a/@ m 50? fia a e'wg W UNHTEE @FFllQldg HERBERT W. DAY, 0? WOLLASTON, MASSACHUSETTS, ASSIGNUE TU SPRAY ENGE- NEEBING GGEI'EANY, 0T5 BQSTON, E EASSACHULQETTS, A CQRPQRA'E'XON OF CHWSET'I'S.

RESSUBE REGULELTQR.

licensee,

Specification of letters Patent. Patented Ange 15, 1922.,

Application filed January 1531921. Serial No. 436,022.

To all whom it may concern."

Be it known that l, Hnrcennr lV. DAY, a citizen of the United States, and a resident of Nollaston, in the county of Norfolk and State of Massachusetts, have invented an Improvement in Pressure Regulators, of which the -following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to fluid pressure controlling means for use in connection with spraying apparatus, and more particularly. for use in connection with paint spraying apparatus in which liquid paint is contained in a substantially air tight receptacle and is forced therefrom by air pressure to an air brush, paint gun or other spraying device, which is also supplied with air under pressure to assist in discharging the liquid therefrom in spray form, as broadly well understood in the art In the use of apparatus otthis class, it is'custornary to maintain the air within the paint receptacle, and at the air brush, under diderent predetermined pressures, and an important object ofiny invention is the provision of improved pressure regulating means "for such purpose. While the invention in its broader aspects is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings, wherein- Fig.1 is a view, with parts broken away, in vertical section or" a liquid receptacle having my improved pressure regulator head attached thereto, the latter being shown in elevation;

Fig. 2 is a view of the regulator head and the receptacle in elevation but at right angles to the position of the parts in Fig. 1, parts being broken away;

Fig. 3 is a plan view of the structure shown in Figs. 1 and 2;

Fig. 4 is a view mainly in transverse section through the pressure regulator head and representing certain gauges and reducing valves;

Fig. 5 is a view mainly in vertical section through the pressure regulator head, and hence at right angles to Fig. l;

Fig. 6 is a view mainly in vertical section taken through the pressure regulator triad about midway between the ends there- 0 Fig. 7 is a view in side elevation and on a smal or scale and representing the receptacle and pressure regulator head and connections therefrom to the paint brush; and

Fig.8 is a view similar to Fig. 5, but representing one part oi the regulator head and showing one out the reducing valves difierently positioned.

Referring more particularly to the drawings, 1 designates a closed air tight recepinside for the paint or other matter to be sprayed, 2 the removable top closure therefor having handles 3 for securing the same in place. The pressure regulator head or body member is indicated generally at 4:, it being suitably attached either directly to the body 1 or to the top closure member 2 thereof, and desirably by means of an integral projection 4: externally 'tlneaded as indicated 5 in Figs. 1, 5 and 6.

The pressure regulator head i is prefer ably composed of a single integral casting of generally cylindrical form, and is here represented as having cast or formed therewith a handle 6 by which the receptacle may be readily and conveniently carried or shifted from place to place. Desirably the pressure regulator head a is of relatively slight vertical extent compared with that of the receptacle 1, so that the receptacle with the pressure regulator head is in stable equilibrium at all times.

The head at is provided with a main pressure chamber 7 formed therein and with a secondary or reduced pressure chamber 8 between which chambers is a partition 9 desirably formed as an integral part of the head l. Valve controlled. counication is provided with the main pressure chamber 7 and the reduced pressure chamber 8 in any suitable manner, as by means of a reducing valve 10 having a tapered head adapted to take against a valve seat 11 in the partition 9. The valve stem 12 at its opposite end is tapped as indicated at 13 into a threaded socket ll of a stem 15 suitably secured to a diaphragm 16 held in place in one end of the regulator headin any suit able manner, as by means of a ring 1? against the outer end of which takes a cap- 18 interiorly threaded as indicated at 19 to engage the eateriorly threaded end 20 of the head 4.

The cap 18 has an extension 21 interiorly threaded as indicated at 22 to receive a threaded sleeve or part 23 of the end cap provided with wing nuts 24. Received between the said end cap and the diaphragm 16 is a relatively strong coil spring 25 by means of which the pressure reducing valve 10 may be controlled.

The described construction permits adjustment by the cap member orsleeve 23' of the tension spring'25, tending to open the valve 10 against the pressure in the main chamber 7.

I contemplate two modes of use of the regulator head, according to the manner in which the parts are connected up to the main supply of compressed air, and to the paint brush or air gun, scribed both of these modes of use.

The main ressure chamber 7 has a passage 25, as s own most clearly in Fig. 4, and which in accordance with the first mode of use is in communication with a source oi air supply under pressure through a suitable valve controlled tube, from which the said supply passage 26 leads. The secondary pressure chamber 8 has an outlet passage 28 shown most clearly in Fi s. 4 and 5, it being in communication wit the 111- terior of the receptacle 1 through a passage 29, a passa e 30 leading therefrom at an abrupt ang e, a passage 31 communicating with the passage 30, shown as in substantial parallelism with the passage 29 and a passa e 32.

e passage 29 is interiorly threaded as indicated at 33 for the reception of a pipe 34 connected to a gauge 35 shown most clearly in Figs. 4 and 6 and adapted to register the air pressure in the tank 1. The chamber 31 is interiorly threaded as indicated at 36 for the reception of a valve 37 of any suitable type. By means of this valve which is adapted to seat against the valve seat 38 near the inner end ot the passage 31, the communication between the chamber 8 and receptacle 1 may be closed, or opened to the desired extent.

Leading from the upper end of the projection 4 and as shown in Fig. 6, in proximity to the passage 32 is a port or passage 39 in communication with a passage 40 at substan-' tiallly right angles thereto, said passages 39, 4O being tor the delivery of the palnt or other liquid to the air brush or paint gun or like a pliance by which means the paint or liquid is applied to the surface to be treated. The passage 40 is interiorly threaded as indicated at 41 for the reception of a suitable valve 42.

The main air chamber 7 is provided with a port 43 shown in Fig. 4 as establishing communication through a pipe 44 with a the said spring 25 and I will proceed to deeas es pressure as that within the main chamber 7.

The chambers 7 and 8 are respectively provided with pet cocks 46, 47 forvdraining oil any water or liquid that may accumulate, and the chamber 7 is preferably provided with a screen or filter 47". is also used to reduce the pressure in the container or receptacle 1, as, for example, for reducing the pressure to atmosphere before taking the regulator head 4 old the receptacle 1. I

The main pressure chamber 7 is, as stated, in communication with a reduced pressure chamber 8, both of said chambers being cored out in or integrally formed in the head 4. Within the scope of m invention and according to the first mo e of use of the ap paratus herein described, and asv indicated in Fig. 8, I provide for conducting the air at a reduced pressure from the chamber 7 to the air brush, paint gun orlike appliance. While any suitable structure for this pur- The pet cock 47 forms an integral part of the head, I have herein represented the head 4 as exteriorly threaded at 48 at its end opposite the diaghragm 16 for the reception of a cap 49.

aid cap is interiorly threaded as indicated at 50 in the nipple 51 for the reception of the threaded end 52 of a pipe or connection 53 of the reducing valve 54 in the casing 54, said valve 54 being connected by arm 55 to the diaphragm 56 controlled by the latter be j coil spring 57, the tension of the ing adapted to be adjusted by the threaded cap 58. From the casing 54' of the said reducing valve leads a pipe 59 in communication with a pipe 60 which, according to the first mode of use of the apparatus'herein described,'leads to the air brush or paint gun 61. Between. the pipe 59 and the pipe 60 is positioned a gauge 62 indicatin the pressure of the air in the pipe 60, and hence the pressure of the air at the paint brush or air gun 61. Obviously although, according to the first mode of use of my invention, the a-ir is' under full pressure within the main chamber 7, the area of the discharge opening from the pipe 59'is so small as compared with the area of the diaphragm 56 that the said diaphragm is responsive to the reduced pressure within the chamber 54' rather than to the pressure within the pipe- 59 and the spring 57 may be adjusted to cause any desired resistance by the said diaphragm 56. p 4 i According to the second mode of use of the a paratus herein disclosed, which mode IS in 4 and 5, the reducing valve casing '54 is reversed in position, so that the 'ipe 59 thereof is attached to the threade nipple rested in Fig. 7 as wellasin Figs.

. ble pipe 60 to the air brush or 51 and the pipe 53 is directly attached to a pipe 63 leading from a main source of supply. The air from the main source of supply is admitted through the said pipe 63 and passing the reducing valve 54:, which is now positioned as indicated in Fig. 5, it enters the main chamber 7.

In said second mode of use of my invention, the air at a reduced pressure is conducted through the passage 26 and the flexipamt gun 61, the paint or other coating material bemg conducted to the said air brush or paint gun through the flexible pipe 64. In boti modes of use of my apparatus, the gauge 45 indicates the air pressure in the chamber 7. According, however, to the first mode of use or my device, the air enters the main chamber 7 under full pressure and is reduced at the reducing valve 5 1, and the reduced pressure of the air passing to the air brush or paint is indicated by the auge 62. in the second mode of use of my invention, the air from the main supply is reduced in pressure as it passes the reducing valve 54., and hence is at a reduced pressure in the chamber 7 and this reduced pressure is indicated by the gauge 45.

7 There is attached to the passage 39 a suitable pipe 65 to lead the paint from the receptacle 1.

It will be understood from the foregoing description that the air is supplied under predetermined pressure to the air brush or paint 'un. Said air brush or paint gun or equivalent structure ma be of any suitable type, such, for exampl e, as that shown in my Patent No.,1,172,'233, dated February 15, 1916.

in accordance with the first mode of use of my apparatus, it will be understood that the pressure in the main chamber 7 of the regulating head is substantially the same as the pressure at the source of supply, due to the passage 26 being open. The spring 25 normally resses the diaphragm 16 inward and maintains the valve 10 open, due to the contact of the outer end of the valve stem with the inner side of said diaphragm. Similarly the reducing valve 54 is normally held open. Air under pressure is permitted to enter the main chamber 7 and the chamber containing the reducing valve 54, and when the premure in said chamber? is suiiioient, the diaphragms pertaining to said valve 10 and 54 will be forced outward and efi'ect a closing of the said valves.

It is evident that the pressure required in the said secondary chambers may be regulated by adjusting the tension of the springs of the respective valves. The pressure in the secondary chamber 8 is regulated to suit the pressure desired in the receptacle 1 and is determined by the indicator range 35. The pressure in the chamber of t e reducing valve 5a is regulated to suit the air pressure desired at the air brush or paint gun, according to the said first mode of use of the said apparatus.

Having thus described one illustrative embodiment of my invention, 1 desire. it to be understood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention be in set forth in the following claims.

clain "1. In an apparatus of the class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith, a self-contained pressure regulator head having a projection adapted to be directly attached to said receptacle or closure thereof, and providing communication with said receptacle, said head being partitioned to provide a plurality of chambers, and a valve seat, one of said chambers being in communication with a source of fluid pressure supply, a reducing valve adapted to said seat, means establishing communication between said regulator head and said air brush or paint un, there being communication through sai regulator head between the liquid in said receptacle and said aint gun or air brush.

7 2. u an apparatus of the class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith, a self-contained pressure regulator head having a projectionadaptcd to be directly attached to said receptacle or closure thereof and providing-communication with said receptacle, said head being partitioned to provide a plurality of chambers and a valve seat, one of said chambers being in communication with a source of fluid pressure supply, a reducing valve adapted to said seat, means establishing communication between said regulator head and said air brush or paint gun, there being communication through said regulator head between the liquid in said rece tacle and said paint gun or air brush, an two gauges, one in communication with at least one of a plurality of chambers and indicating the pressure upon the liquid in the receptacle and at the air brush or paint gun.

3. In an apparatus of the class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith, a self-contained pressure regu lator head having a projection adapted to be directly attached to said receptacle or closure thereof and providin communication with said receptacle, said cad being partitioned to provide a plurality of chambers and a valve seat, one of said chambers being in communication with a source of fluid pressure supply, a reducing valve adapted nth munication with a source of fiui to said seat, means establishing communication between another of said chambers and the receptacle to apply pressure to the liquid therein, a second reducing valve in communication with the first mentioned chamher and a communication from said last mentioned reducin valve to the air brush or paint gun, therelieing communication .via said regulator head between the liquid in said receptacle and said paint gun or air brush.

4. In an apparatus of the class described and in combination, a liquid. receptacle and an air brush or paint gun in connection therewith, a self-contained regulator head consisting of an integral casting having an integral projection to be directly attached to the liquid receptacle or closure thereof, and provldin communication with said receptacle, said head being partitioned to pro vide a plurality of chambers, and a valve seat, one of said chambers bein in compressure supply, a reducing valve adapted to said seat, means establishing communication be tween the last mentioned chamber and a rece tacle to transmit air ressure to the liquid in the latter, there being communica tion between that chamber whlch is in communication with the source of fluid pressure supply and the air brush or paint an.

5. In an apparatus ofthe class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith, a self-contained pressure re ulator head consisting of an integral QfiSlZlllg having an integral projection exteriorly threaded for direct attachment to the li uid receptacle or closure thereof and provi ing communication with said receptacle, said head being partitioned to provide a plural ity of chambers and a valve seat, one of said chambers being in communication with a source of fluid pressure supply, a reducing valve adapted to said seat, means establishing communication between the last mentioned chamber and the receptacle to trans mit air pressure to the liquid in the latter, there bein communication between that chamber w ich is in communication with the source of fluid pressure supply and the air brush or paint gun.

6. In an apparatus of the class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith, a self-contained pressure regulator head of relatively slight vertical height compared with that of the receptacle, so that as attached directly thereto it projects to a comparatively slight extent thereabove, said head having a projection adapted to be directly attached to said receptacle or closure thereof and providing communication with said receptacle, said head being partitioned to provide a, plurality of chambers with, a seltcontamed' and a valve seat, one of said chambers bein I in communication with a source of flui pressure supply, a reducing valve adapted to said seat, means establish ng communication between said regulator head and said air brush or paint gun, there being communication via-said regulator head between the liquid in said receptacle and said paint gun or air brush. Y

7. An apparatus of-the class described and in-combination, a liquid receptacle and an air brush or paint to provi e a plurality of chambers, and a valve seat, one of said chambers being in communication with a source of fluid pressure supply, a reducing valve adapted to said seat, means establishing communication s5 roviding communication with said rece tac e, s a1d head being partitioned.

between said regulator head and said air brush or paint gun, there being communication via said regulator head between the liquid in said receptacle and said paint gun or air brush.

8. In an apparatus of the class described and in combination, a liquid receptacle and an air brush or paint gun in connection therewith 'a tor head having a'projection adapted to be directly attached to said receptacle or closure thereof and providing communication with said receptacle, said projection having formed therein a passage for conveying air under (pressure onto the liquid in the receptacle an also having a passage for conveying the liquid from the receptacle to the air brush or paint gun, said head-being partitioned to provide a plurality of chainbers and a valveseat, one of said chambers being in communication with a source of fluid pressure 7 supply, a reducing valve adapted to said seat, means establishing communication between said regulator head and said air brush or paint gun, there being communication via said regulator head between the liquid in said receptacle and said paint gun or air brush.

9. In an apparatus of the class described and in combination, a liquid receptacle and self-contained pressure regulabein in communication with a source of chamber, there being communication via flui pressure supply, a reducing valve said regulator head between the liquid in adapted to said seat, means establishing comsaid receptacle and said paint gun or air 10 munication between another of said chambrush.

5 hers and the receptacle to apply pressure to In testimony whereof, I have signed my the liquid therein, a second reducing valve name to this specification. in communication with the first mentioned HERBERT W. DAY. 

